sparco spec: 15 X 7J
lenso spec : 17 X ?? ( forgot the spec )
FC different no much, the power was different much.
my racing sparco 15" 10.5 KG with this lenso 17" is 7KG.
compare this 2, racing sparco 15" 1 full tank can go (430km) city use, ( 500km ) highway use.
lenso 17" 1 full tank ( 380km ) city use ( 520km ) highway use.
the 15" more save petrol at city.
the 17" more save petrol at highway.
17" lenso need take care more, if not bengko easy la.
i use 6 month 3 biji bengko la.

As what can conclude from the result compiled above, bigger diameter rims show better fc on high speed driving while smaller diameter rims shown greater acceleration? Correct me if i'm wrong.
Also how the rims diameter affect the fc? Torque required to accelerate? Is bigger diameter rims required less torque to spin or the other way round?